{"id":168180,"date":"2015-06-13T00:00:00","date_gmt":"2015-06-13T00:00:00","guid":{"rendered":"https:\/\/www.microsoft.com\/en-us\/research\/msr-research-item\/unified-address-translation-for-memory-mapped-ssds-with-flashmap\/"},"modified":"2018-10-16T20:08:52","modified_gmt":"2018-10-17T03:08:52","slug":"unified-address-translation-for-memory-mapped-ssds-with-flashmap","status":"publish","type":"msr-research-item","link":"https:\/\/www.microsoft.com\/en-us\/research\/publication\/unified-address-translation-for-memory-mapped-ssds-with-flashmap\/","title":{"rendered":"Unified Address Translation for Memory-Mapped SSDs with FlashMap"},"content":{"rendered":"<div class=\"asset-content\">\n<p>Applications can map data on SSDs into virtual memory to transparently scale beyond DRAM capacity, permitting them to leverage high SSD capacities with few code changes. Obtaining good performance for memory-mapped SSD content, however, is hard because the virtual memory layer, the file system and the flash translation layer (FTL) perform address translations, sanity and permission checks independently from each other. We introduce FlashMap, an SSD interface that is<br \/>\noptimized for memory-mapped SSD-files. FlashMap combines all the address translations into page tables that are used to index files and also to store the FTL-level mappings without altering the guarantees of the file system or the FTL. It uses the state in the OS memory manager and the page tables to perform sanity and permission checks respectively. By combining these layers, FlashMap reduces critical-path latency and improves DRAM caching efficiency. We find that this in-<br \/>\ncreases performance for applications by up to 3.32x compared to state-of-the-art SSD file-mapping mechanisms. Additionally, latency of SSD accesses reduces by up to 53.2%.<\/p>\n<\/div>\n<p><!-- .asset-content --><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Applications can map data on SSDs into virtual memory to transparently scale beyond DRAM capacity, permitting them to leverage high SSD capacities with few code changes. Obtaining good performance for memory-mapped SSD content, however, is hard because the virtual memory layer, the file system and the flash translation layer (FTL) perform address translations, sanity and [&hellip;]<\/p>\n","protected":false},"featured_media":0,"template":"","meta":{"msr-url-field":"","msr-podcast-episode":"","msrModifiedDate":"","msrModifiedDateEnabled":false,"ep_exclude_from_search":false,"_classifai_error":"","msr-author-ordering":null,"msr_publishername":"IEEE - Institute of Electrical and Electronics Engineers","msr_publisher_other":"","msr_booktitle":"","msr_chapter":"","msr_edition":"International Symposium on Computer Architecture (ISCA'15)","msr_editors":"","msr_how_published":"","msr_isbn":"","msr_issue":"","msr_journal":"","msr_number":"","msr_organization":"","msr_pages_string":"","msr_page_range_start":"","msr_page_range_end":"","msr_series":"","msr_volume":"","msr_copyright":"\u00a9 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other users, including reprinting\/ republishing this material for advertising or promotional purposes, creating new collective works for resale or redistribution to servers or lists, or reuse of any copyrighted components of this work in other works.","msr_conference_name":"International Symposium on Computer Architecture (ISCA'15)","msr_doi":"","msr_arxiv_id":"","msr_s2_paper_id":"","msr_mag_id":"","msr_pubmed_id":"","msr_other_authors":"Jian Huang, Moinuddin K. 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The project explores how to best leverage such new memory technologies inside systems of all sizes and shapes: from mobile to data center scale. Former Interns: Jian Huang, Georgia Tech (2013, 2014, &amp; 2015) Jing Li, UCSD (2013) Yanqi&hellip;","_links":{"self":[{"href":"https:\/\/www.microsoft.com\/en-us\/research\/wp-json\/wp\/v2\/msr-project\/171456"}]}}]},"_links":{"self":[{"href":"https:\/\/www.microsoft.com\/en-us\/research\/wp-json\/wp\/v2\/msr-research-item\/168180","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.microsoft.com\/en-us\/research\/wp-json\/wp\/v2\/msr-research-item"}],"about":[{"href":"https:\/\/www.microsoft.com\/en-us\/research\/wp-json\/wp\/v2\/types\/msr-research-item"}],"version-history":[{"count":1,"href":"https:\/\/www.microsoft.com\/en-us\/research\/wp-json\/wp\/v2\/msr-research-item\/168180\/revisions"}],"predecessor-version":[{"id":523025,"href":"https:\/\/www.microsoft.com\/en-us\/research\/wp-json\/wp\/v2\/msr-research-item\/168180\/revisions\/523025"}],"wp:attachment":[{"href":"https:\/\/www.microsoft.com\/en-us\/research\/wp-json\/wp\/v2\/media?parent=168180"}],"wp:term":[{"taxonomy":"msr-research-highlight","embeddable":true,"href":"https:\/\/www.microsoft.com\/en-us\/research\/wp-json\/wp\/v2\/msr-research-highlight?post=168180"},{"taxonomy":"msr-research-area","embeddable":true,"href":"https:\/\/www.microsoft.com\/en-us\/research\/wp-json\/wp\/v2\/research-area?post=168180"},{"taxonomy":"msr-publication-type","embeddable":true,"href":"https:\/\/www.microsoft.com\/en-us\/research\/wp-json\/wp\/v2\/msr-publication-type?post=168180"},{"taxonomy":"msr-publisher","embeddable":true,"href":"https:\/\/www.microsoft.com\/en-us\/research\/wp-json\/wp\/v2\/msr-publisher?post=168180"},{"taxonomy":"msr-focus-area","embeddable":true,"href":"https:\/\/www.microsoft.com\/en-us\/research\/wp-json\/wp\/v2\/msr-focus-area?post=168180"},{"taxonomy":"msr-locale","embeddable":true,"href":"https:\/\/www.microsoft.com\/en-us\/research\/wp-json\/wp\/v2\/msr-locale?post=168180"},{"taxonomy":"msr-post-option","embeddable":true,"href":"https:\/\/www.microsoft.com\/en-us\/research\/wp-json\/wp\/v2\/msr-post-option?post=168180"},{"taxonomy":"msr-field-of-study","embeddable":true,"href":"https:\/\/www.microsoft.com\/en-us\/research\/wp-json\/wp\/v2\/msr-field-of-study?post=168180"},{"taxonomy":"msr-conference","embeddable":true,"href":"https:\/\/www.microsoft.com\/en-us\/research\/wp-json\/wp\/v2\/msr-conference?post=168180"},{"taxonomy":"msr-journal","embeddable":true,"href":"https:\/\/www.microsoft.com\/en-us\/research\/wp-json\/wp\/v2\/msr-journal?post=168180"},{"taxonomy":"msr-impact-theme","embeddable":true,"href":"https:\/\/www.microsoft.com\/en-us\/research\/wp-json\/wp\/v2\/msr-impact-theme?post=168180"},{"taxonomy":"msr-pillar","embeddable":true,"href":"https:\/\/www.microsoft.com\/en-us\/research\/wp-json\/wp\/v2\/msr-pillar?post=168180"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}